Coal cutting machine



Dec. l, 1931. 1 J. SMITH 1,834,808

GOAL CUTTING MACHINE Filed May 3 1930 3 Sheets-Sheet l IL... W'III'III l, 1931. SMlTH 1,834,808

COAL CUTTING MACHINE Filed May 5 1950 3 Sheets-Sheet 2 3um um Dec. l, 1931. L. J. SMITH 1,834,808

COAL CUTTING MACHINE Filed May 5 1930 3 Sheets-Sheet 5 Patented Dec. l, 1931 UNITED 'STATES LEE JAY SMITH, F VULCAN, ALBERTA, CANADA COAL CUTTING VL IACIHINE Application led May 3,

My invention relates to a portable machine for the cutting and mining of coal and is a quicker and cheaper method than the present system in use.

I more particularly describe my invention v by means of the illustrations in the accompanying drawings in which Figure l is a cross section through the casing showing worm, and worm wheels on auger shaft extensions engaging with same.

Figure 2 is a sectional plan view through the casing showing the worm and worm wheels engaging with same.

' Figure?) is an upright view of the machine and showing in dotted. lines the machine in position Jfor vertical drilling.

Figure 4 is a plan View of the machine showing the augers and cutting tools and anchor column.

Figure 5 is a cross section view of machine showing drills, augers and feed rods.

Figure 6 is a cross section view of machine showingaugers and drills.

Figure 7 is a sectional view of the clamp holding cutting tool.

Figure 8 is a cross section of the key.

Similar numerals refer to similar parts throughout the various views.

1 is the casing of the machine which is formed in two parts and bolted together by bolts 2. A gasket 3 is fitted between the two halves of the casing 1 to form a tight joint. Inside of casing 1 is a left hand Worm 4 running the entire length of the machine and having its ends journalled in tapered ball bearings 5. 'Ihe ends of the worm 4 projecting beyond casing are formed to make connection to motor supplying the driving power. A series of worm wheels 7 mesh with the Worm 4 and form part of the shafts 8 which are coupled to augers 9 by means of the couplings 10, the shafts being held in the couplings by set screws 11. The shafts 8 are journalled in tapered ball bearings 12 set into casing 1. Pipes 13 are screwed into casing 1 and form a covering for the augers 9 and are held rigidly in place by keys 14. Slots 15 are formed Vin the top and bottom of pipe covering 13 near the coupling 10 to allow of the removal of the coal ldust which accumulates around 1930. Serial No. 449,577.

the augers. Attached toends of augers 9 are drills 16, made of triangular steel with a ared drill head 17. These drills are attached to ends of augers by means of a clamp 18. Cutting tools 19 of triangular steel are also attached to ends of augers by the clamp 18 and can be adjusted to any angle required and lengthened or shortened as desired.

The machine is held in position by means of a strap 20 diamond shaped, through the centre of which runs anchor pipe 21 having an internal thread 22 which engages with a vertical stem 23, t-he said stem working inside the anchor pipe 21 and forming part of l a standard jack, being the continuation of the operating stem of same. Bolts 24 pass through strap 20 on either side of anchor pipe 21 to hold the strap in position. A

collar 25 is bolted to anchor pipe 21 by bolt 26 and has a projection 27 to which the strap 20 is attached when removed from the horizontal position to its position for vertical drilling. The collar 25 can be raised or lowered on the anchor pipe 2l to suit the height of the roof in the mine chamber.

Attached to either end of diamond shaped strap 20 are split housings 28 and 29, threaded to receive guiding rods 30 and 3l, which are the extensions of two of the shafts 8 and are attached to same by the couplings 32 and 33.

In operation, the machine is set up on the anchor pipe and held in place by diamond shaped strap and can be raised or lowered to any required height. The machine is placed up close to the face ofthe coal so that the full length of the augers can be utilized. When the power is applied to the worm, the

augers are engaged by same and turned by I means of the worm wheels attached to the shafts to which the augers are affixed, thus forcing the augers to penetrate the coal seam to the required depth. The depth that the augers penetrate is governed by the length of the guiding rods which are the extensions of two of the augers and which are journalled in the split housings attached to the diamond shaped strap.

If it is desired to drill vertically into the roof of the chamber, the diamond shaped 2 Y j i e '1,834,808

'strap is turned quarter Way around, thereby turning the machine With it to a vertical posi- V.tion and the operation of drilling is carried Von* in the saine manner as for horizontal drill- 5 ing. l l Y What IV claim is:-

In coal cutting machines', a battery of boring members having driven Shafts and operating connections, a casing containing said operating connections and having shaft orices, threaded guide rods extending from two of said driven shafts projecting through said oriices, a supporting bracket havingfrigidly' held nuts mounted on said threaded guide rods and flaring from either end -to' a centralV clamping portionV and lcarrying clamping 'l 'bolts andnuts, a .springclarnping collar havf ingja projection therefrom utilizedin changing theposition ofsaid collar in Said bracket and" ananchor 'column internally threaded and gr'ippedinl saidf'collar andk adapted lto "forman *operating part ofa Standardlifting` 

